Deoksu Jang clan

The Deoksu Jang clan is the bon-gwan or Korean clan from Kaepung County, North Hwanghae Province. The clan was founded by, an Uyghur Muslim civil servant who served in the Goryeo court.
According to the Korean census held in 2015, the clan has 24,185 members.

Origin

Jang Sun-ryong was originally of Uyghur descent, and was the son of Jang Baek-chang, who held the official title of Pildo-chi during the reign of the Yuan Dynasty.
It is said that Jang Sun-ryong and Jang Baek-chang were Uyghurs, a Turkic people in Central Asia. They are an ethnic group currently living in China's Xinjiang Weiwuer Autonomous Region and Central Asia, and their main region is Xuelianhe. Lee Hyeon, the founder of the Imcheon Lee clan, and Seol Son, the founder of the Gyeongju Seol clan, are said to be Uyghurs and from the Seolian River, like Jang Baek-chang. Tulk, Mongolians, Arabs, and Muslims live in the Seolian River region, but currently, they are all Uyghurs. But it is difficult to determine the detailed ethnic origin of the founder.
According to Deoksu Jang clan Genealogy and the History of Goryeo, Jang Sun-ryong entered Goryeo as a fatherly master of Princess Jeguk, daughter of Kublai Khan, who was married off to Chungnyeol of Goryeo.
He later became a naturalized citizen of Goryeo; becoming Cheomuichamri and Munhachanseongsa. With an unnamed wife, he eventually had 1 son: Jang Ryang.
It is said that his descendants made Deoksu their hometown because he served as a military official and was appointed as Internal Prince Deokseong, and was granted Deoksu-hyeon as his hometown.
The Deoksu Jang clan produced 14 people who passed the civil service exam, 1 Queen, and 2 Royal consorts during the Joseon Dynasty.